<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <div id="app">
      <div>
        <span>姓名:</span>
        <input type="text" v-model="name" />
      </div>
      <div>
        <span>年龄:</span>
        <input type="number" v-model="age" />
      </div>
      <div>
        <span>性别:</span>
        <select v-model="gender">
          <option value="男">男</option>
          <option value="女">女</option>
        </select>
      </div>
      <div>
        <button @click="change">添加/修改</button>
      </div>
      <div>
        <table border="1" cellpadding="10" cellspacing="0">
          <tr>
            <th>序号</th>
            <th>姓名</th>
            <th>年龄</th>
            <th>性别</th>
            <th>操作</th>
          </tr>
          <tr v-for="(item,index) in list" key="index">
            <td>{{index+1}}</td>
            <td>{{item.name}}</td>
            <td>{{item.age}}</td>
            <td>{{item.gender}}</td>
            <td>
              <button @click="del(item.id)">删除</button>
              <button @click="updateUser(item)">编辑</button>
            </td>
          </tr>
        </table>
      </div>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          name: "",
          gender: "男",
          age: 0,
          currId: "0",
          list: [],
          Update: false,
        },
        methods: {
          change() {
            if (!this.name || !this.age) {
              alert("请输入姓名和年龄");
              return;
            }
            if (!this.Update) {
              this.list.push({
                name: this.name,
                age: this.age,
                gender: this.gender,
              });
            } else {
              let newarr = this.list.filter((item) => item.id === this.currId);
              newarr[0].gender = this.gender;
              newarr[0].name = this.name;
              newarr[0].age = this.age;
              this.Update = !this.Update;
            }

            this.name = "";
            this.age = 0;
          },
          del(id) {
            this.list = this.list.filter((item) => item.id !== id);
          },
          updateUser(ele) {
            this.name = ele.name;
            this.age = ele.age;
            this.gender = ele.gender;
            this.Update = true;
            this.currId = ele.id;
          },
        },
      });
    </script>
  </body>
</html>
